Protective inner liner for pneumatic tires



7"..I 0. 4; 2 4 1v um C S R mul om Jan. 16, 1923.

PROTECTIVE INNER LINER FOR PNEUMATIC TIRES.

FILED NOV. 4,1919.

Patented den. l5, i923.

e. ci ir" in.. Si

BENJAMIN HIRSCH, OF LEOMINSTER, MASSACHUSETTS.

PROTECTIVE INNER LINER FOR PNEUMATIC TIRES.

Application filed November 4, 1919.

To ZZ who/m, t may concern.'

Be it known that I, BnNJAMiN Ilinsoii, a citizen ofthe United States,residing` atLeoininster, in the county of `Worcester and State ofMassachusetts, have invented certain new and useful Improvements inProtective Inner Liners for Pneumatic Tires, of which the following is aspecification.

This invention has for its object to prolong the period of usefulness ofpneumatic tires and to practically prevent blowouts, punctures and flattires. t

The invention consists of a metal lining for the shoe or casing or apneumatic tire to come between the shoe and inner tube, thereby mutuallyprotecting` each and increasing the life of the tire so that it maypractically be worn to the last layer before being discarded, theprotector being removed and used again with another tire which may beunserviceable for ordinary use without the application thereto of theinvention.

The drawings illustrate a preferred embodiment of the invention.However, it is to be understood that in adapting the same to meetdifferent conditions, various changes in the form, proportion, and minordetails of construction may be resorted to without departing from thenature of the invention as claimed hereinafter.

Referring to the drawings Figure l is a sectional perspective view. of apneumatic tire illustrating the application of the invention7 Figure 2is a detail view of a portion of the tire with the layers broken away toillustrate more clearly the protective lining, and

Figure 3 is a detail perspective view of a portion of the liningillustrating the layers adjacent thereto and upon opposite sidesthereof.

Corresponding and like parts are referred to in the followingdescription and indicates :in the several views of the drawing by likereference characters.

The foraminous lining` l which constitutes the essence of the inventionconsists of a metal strip bent into circular form and 50 transverselycurved, said strip being relatively thick intermediate of its edges andgradually decreasing in thickness from the medial line to its oppositeedges. The lining may be split or continuous, that is, the lining isprovided with innumerable minute Serial No. 335,576.

openings or foraniina 2 which tend to decrease the weight and add to theflexibility of the protector. While it is contemplated to construct thedevice of any metal yet it is preferred to utilize brass or analogousconiposition, the same possessing a degree ot' resiliency so as to yieldand not detract from the cushioning effect of the tire.

The protective lining or inner rim will be provided in different sizescorresponding with the different sizes and makes of pneumatic tires sothat when required, a protective inner rim of proper size may beobtained to snugly fit within the shoe or casing whose life and periodof service is to be pro; longed. The inner rim or lining when inposition is disposed between the inner tube 3 and the inner wall of theshoe or casing 4. In cross section, the lining or inner rim extendsabout two-thirds or approximately three fourths of a circle. The outerthickened portion is disposed adjacent the inner side of the treadportion of the shoe or casing and the edge portion extends a shortdistance along the side of the shoe or casing. This is indicated mostclearly in Fig. l. Fig. 3 illustrates the lining or inner rirn havinglayers adjacent the inner and the outer sides thereof and these layersmay if desired constitute a protective covering' or may consist of theinner tube and the inner layer of the shoe or casing.

The invention provides a lining' or protective inner rim which may beapplied to pneumatic tires which have become worn and unserviceable forordinary use. A tire of this character when tted with a liningorprotective inner rim is rendered practically proof against blowout andpuncture since the metal lining distributes and sustains the innerpressure and prevents an object from penetrating the inner tube. Theiiexibility of the protector does not detract from the cushioning effectof thetire. llVeak places in a worn tire are reinforced and the tire maybe worn nearly through to the lining or protective inner riin beforebeing discarifled and the rini may be removed and used repeatedly aswill be readily understood.

Having thus fully described my invention what I claim as new and desireto secure by Letters Patent, is :-h

A removable protecting device for tire casings comprising an annularmetallic resilient body curved transversely and provided with :Lplurality of ininute perforabeing disposed at the tread portion of thelO tions disposed in Close relation to one ancasing.

other for reducing the weight of the body In testimony whereof I aiiixmy signature and for adding to thle rlesiiient qualities in presence oftwo Witnesses.

thereol the od Ura( ual deoreesin0V in w l t thickness from iteroumfeiiientiai eentei:l to- BENJAMIN HRQH' werd its circumferentialedges, defining ex- W'itnesses: ible wings for engaging the side Wallsof :L RALPH W. FOSTER, tire casing, the thickest portion of the body A.C. LESLIE.

